AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/arch/sparc
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Christoph Hellwig 2a29e9f6b9 sparc64/pci_sun4v: fix ATU checks for large DMA masks 
Now that we allow drivers to always need to set larger than required
DMA masks we need to be a little more careful in the sun4v PCI iommu
driver to chose when to select the ATU support - a larger DMA mask
can be set even when the platform does not support ATU, so we always
have to check if it is avaiable before using it.  Add a little helper
for that and use it in all the places where we make ATU usage decisions
based on the DMA mask.

Fixes: 24132a419c ("sparc64/pci_sun4v: allow large DMA masks")
Reported-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Meelis Roos <mroos@linux.ee>
Acked-by: David S. Miller <davem@davemloft.net>
2019-04-10 21:42:04 +02:00
..
boot License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
configs configs: get rid of obsolete CONFIG_ENABLE_WARN_DEPRECATED 2019-03-07 18:32:02 -08:00
crypto crypto: clarify name of WEAK_KEY request flag 2019-01-25 18:41:52 +08:00
include syscalls: Remove start and number from syscall_set_arguments() args 2019-04-05 09:27:23 -04:00
kernel sparc64/pci_sun4v: fix ATU checks for large DMA masks 2019-04-10 21:42:04 +02:00
lib atomics/treewide: Rename __atomic_add_unless() => atomic_fetch_add_unless() 2018-06-21 14:22:32 +02:00
math-emu License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mm sparc: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
net bpf: sparc64: Enable sparc64 jit to provide bpf_line_info 2018-12-20 02:04:53 +01:00
oprofile sparc/oprofile: Convert timer_stop() to use synchronize_rcu() 2018-11-08 21:43:20 -08:00
power License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
prom License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vdso sparc: vdso: Drop implicit common-page-size linker flag 2018-12-21 11:24:38 -08:00
Kbuild vDSO for sparc 2017-11-15 14:21:03 +09:00
Kconfig 32-bit userspace ABI: introduce ARCH_32BIT_OFF_T config option 2019-02-19 10:10:05 +01:00
Kconfig.debug Kconfig: consolidate the "Kernel hacking" menu 2018-08-02 08:06:48 +09:00
Makefile sparc: generate uapi header and system call table files 2018-11-18 18:52:22 -08:00